Sometimes we can can watch a movie endless times and still not notice something that, once you notice it, is glaringly obvious.

These aren't Easter eggs as such, nor are they bloopers, they're just details and moments we either misunderstood, misremembered or just plain didn't even notice…

1. C-3PO has a silver leg. Not gold, like you thought

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How many times have you seen Star Wars? Come on, now… 50? 60? 100? But have you ever noticed that finicky protocol droid C-3PO isn't quite the all-gold disco robot he appears to be?

Lean in close to the original 1977 movie and you'll notice that the bottom half of his right leg is actually silver. Which, of course, was his original colour before the Clone Wars. You just didn't notice because he spent much of Episode IV in a desert, reflecting yellow sand.

2. Tim Burton didn't direct Tim Burton's The Nightmare Before Christmas

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The Goth God's fingerprints are all over this dark festive fave, except, despite what the title tells you, he didn't actually direct it.

Because he wrote it, right?

Nope. Tim Burton provided the original poem that inspired it and some concept art, but he was just the producer of this deliciously macabre stop-motion fantasy.

But then presumably calling the movie Henry Selick's The Nightmare Before Christmas didn't have quite the same marquee value.

3. The 'Bond' in the barrel of the gun in the opening of the first three Bond films isn't Sean Connery

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The opening gun-barrel sequence is one of the signature elements of a James Bond film, having been present, more or less, for every one of the 24 official 007 flicks.

But check out the James Bond figure in the first three – Dr No, From Russia With Love and Goldfinger – and you'll see it's not its star, Sean Connery, but a stuntman – Bob Simmons. Connery himself only did the walk-and-shoot from Thunderball onwards.

4. Tom Cruise isn't wearing sunglasses when he does the pants dance in Risky Business

Remember Tom Cruise sliding into shot in his pants and socks, all Wayfarers and cheeky grin?

Risky Business and Ray-Bans – the ultimate iconic duo.

But while the Cruiser does don the sunnies for a chunk of the movie, he wasn't wearing them for the movie's signature scene, where he mimes to Bob Seger's redneck classic 'Old Time Rock and Roll'.

5. The "Dollars" trilogy aren't a trilogy at all

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Not only do the supposed "Dollars" trilogy of spaghetti westerns from Sergio Leone not all have "Dollars" in the title (the first two – A Fistful of Dollars and For a Few Dollars More have, but The Good, the Bad and the Ugly quite obviously doesn't), they're not connected narratively and Eastwood doesn't play the same person.

Instead, the idea for the three being a trilogy, centred around Clint Eastwood's "man with no name", was simply a marketing ploy from the movies' US distributor.

The supposed "man with no name" is actually three men with names – "Joe", "Manco" and "Blondie", in order.

6. 2001: A Space Odyssey isn't based on the Arthur C Clarke novel

It was the other way round.

Although Stanley Kubrick's science fiction opus was inspired by one of Arthur C Clarke's short stories (1948's The Sentinel), the story of 2001: A Space Odyssey was mostly fleshed out by the two men together.

It was only after the movie came out that Clarke released his chunky novelisation, and indeed early versions of the book came with a "based on a screenplay by Stanley Kubrick and Arthur C Clarke" credit, a line that has somehow slipped off subsequent editions.

7. They never use the word Ewok in Return of the Jedi

At no point in Return of the Jedi are Endor's teddy bear-like natives ever referred to as Ewoks. The only reason we know to call them that is from the film's end titles, and indeed from the truly terrible theme song from the Ewoks cartoon series.

Oh and George Lucas didn't direct Jedi. Richard Marquand did.

8. Jason isn't the killer in the original Friday 13th

The ski-mask-rocking Jason Voorhees is one of slasher cinema's most iconic killers from his appearances in the Friday the 13th movies.

Except he only became that from the first sequel onwards. In the first movie of the splattery franchise, it's his grieving mother (Jason died before the film begins) who's revealed to be the Camp Crystal Lake murderer. Jason "pops up" only at the very end.

9. John Merrick isn't the Elephant Man's name

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Quite why Dr Frederick Treves, the surgeon who tended to the so-called Elephant Man, referred to his patient as "John" Merrick, when his real name was actually Joseph Merrick, is unknown. Contemporary newspaper accounts refer to him as Joseph and we know from surviving correspondence that Merrick signed his name as Joseph, but instead David Lynch's 1980 biopic went with Treves' preferred name.

From: Digital Spy